Roof type ventilator



- March 11', 1958 L..L. SMITH RO0F TYPE VENTILATOR Filed March 2a, 1956INVENTOR. [ester [3. 57271%];

United States Patent ROOF TYPE VENTILATOR Lester L. Smith, Peoria, Ill.Application March 28, 1956, Serial No. 574,462 4 Claims. (Cl. 98-42)This invention relates to roof type ventilators, and more particularlyto such ventilators which are adapted to afford ventilation and goodweather protection when mounted in various positions in either flat orpitched roofs.

One of the general objects of this invention is to provide a plural partventilator having openings for the a's a result of disproportionment ofair flow passages passage of air and parts affording adequate weathershields for the openings, and wherein the several parts are soconstructed and arranged that connected portions of the air flow passagethrough the ventilator are propor tioned to provide substantiallyuniform air flow areas, thereby'to avoid undesirable localizedrestrictions to the flow of air through the ventilator. I I, H

As another and more specific object, my invention comprehends theprovision of a screened roof .type ventilator wherein the placement ofthe screen and the structures of associated parts are selected to affordboth com pensation for the solid area of the screen and an int:- provedmeasure of weather protection in the ventilator.

Other objects and advantages of the invention will be apparent from thefollowing description and the accompanying drawings in which similarcharacters of reference indicate similar parts throughout the severalviews.

Referring to the drawings:

Fig. 1 is a perspective view of a roof type ventilator embodying apreferred form of my invention;

Figs. 2 and 3 are respectively longitudinal and lateral sectional viewstaken substantially at the positions and in the direction indicated bylines 2--2 and 33 and accompanying arrows in Fig. 1; and

Fig. 4 is a top sectional view taken substantially at the positionindicated by a line 44 in Fig. 2, and in the direction indicated byarrows.

In the exemplary embodiment of my roof type ventilator which is shown inthe accompanying drawings for illustrative purposes, a metal base sheetprovides relatively coplanar side mounting flange portions 12 and 13 andend mounting flange portions 14 and 15, and has an opening 16 ofpredetermined area in the mid-portion thereof. Although the opening 16may be of any desired shape, a rectangular shape, such as thatillustrated, affords a convenient shape for ease of fabrication. Asdepicted in Figs. 2, 3 and 4, flanges 17, 18, 19 and 20 are provided onthe base sheet adjacent the opening 16 and extend upwardly from themounting flange portions. The flanges 17, 18, 19 and 20 of the disclosedstructure are integral with the base sheet 10, as by being drawn fromthe base sheet material after the piercing of an opening smaller thanthe opening 16, and have their adjacent ends suitably adjoined toprovide water-tight joints around the opening. The flanges 17, 18, 19and 20 together serve as a mounting for a wall 22 which, in the presentinstance, is fabricated from a formed strip of sheet metal of uniformwidth and encompasses the exterior surfaces of the mounting flanges. Thewall 22 has side portions 23 and 24 and end portions 25 and 26 portionsof the base sheet, so that the end and side por-' tions of the walldiverge upwardly, whereby the opening encompassed by the top of. thewall is larger than the opening 16 in the base sheet. of the wallportions and the acute angular relationship between the wall portionsand the mounting flange portions not only affords weather protection,because of thetendency to deflect driving rain and the like outwardlyanddownwardly therefrom, but also is utilized in the disclosed structure tocompensate for the restriction of air flow which accompanies the use ofa screen 27 secured to the top of the wall and which covers the openingencompassed by the wall at its top. The screen 27 may be of the usualwire mesh type and embodies solid material having a multiplicity ofopenings therein. In order to avoid restriction to the air flow throughthe ventilator therein, the area of the opening at the top of the wall22 is larger than the opening 16 in the base sheet by an amountsubstantially proportionate to the percentage of the total screenedareawhichis occupied by the solid material of the screen.

For added weatherprotection, the screened opening at the" top of thewall 22 is covered by a cap 28, which cap, in the present instance, hasa relatively flat top portion 29 bent downwardly at opposite ends toprovide end cover flanges 30 and 32. Also,

side cover pieces 33 and 34 are secured to opposite, sides of the topportion 29 to provide side cover flanges thereon which are substantiallyco-extensive with the end cover flanges 30 and 32. Brackets 35, 36, 37and 38 are secured to the side cover pieces 33 and 34 near the cornersof the cover-and extend downwardly therefrom, with their bottom endssecured to the mounting flange portions of the base sheet to support thecap relatively to the base sheet.

In the disclosed structure, the top portion 29 of the cap, as that capis supported from the base sheet by the brackets 35, 36, 37 and 38, isspaced sufliciently above the top of the wall 22 and the end flanges 30and 32 and side pieces 33 and 34 of the cap are spaced from the portionsof the wall 22 in amounts such that the combined air flow areas betweenthose parts are at least equal to the area of the opening 16 in the basesheet. The spacing between the bottoms of the end flanges 30 and 32 andside parts 33 and 34 and the mounting flange portions of the base sheetis also sufficient to afford air flow area at least equal to the area ofthe opening 16. It may also be observed that the described air flowopenings through the ventilator structure are provided with the cap andwall so relatively disposed that the end flanges and side parts of thecap overlap substantial portions of the upper part of the wall 22,thereby to afford adequate weather protection for driving rain, snow andthe like.

From the foregoing description and reference to the accompanyingdrawings, it may be readily understood that I have provided a roof typeventilator having open ventilating spaces on all sides and which affordsfully adequate weather protection with various portions of theventilator structure relatively disposed and proportioned to avoidlimiting restrictions at any part of the ventilator stnicture which tendto curtail the passage of air at any part of the ventilator ensemble.

While I have illustrated a preferred embodiment of my invention, manymodifications may be made without departing from the spirit of theinvention, and I do not wish to be limited to the precise details ofconstruction Patented Mar. 11, 19,58

The upward divergence set forth, but desire to avail myself of allchanges within the scope of the appended claims.

Having thus described my'invention, what I claim as new and desire tosecure by Letters Patent of the. United States is:

1. A roof. type ventilator comprising, in combination,

a relatively flat base. sheet having an. opening ofpred'e terminedareain the mid portion thereof and providing. substantially coplanarmounting. portions surroundingv the. "opening, means secured to the basesheet and providing a Wall encompassing the opening in adjacentrelationship thereto,. said wallv projecting upwardly from: the basesheet. and having portions flared outwardly from;v one.

another towardthe tops thereofand. beingin' acute. angular relationshipto the mounting portionsi (lithe base sheet to. provide weather.protection by affording; outward and. downward. deflection to driving;rain. and the.

like, and-the area of. the opening, encompassedby the wall being larger.at the top than at the bottom,.a.scr.een:

wardlyin overlapping and spaced relationship to theexterior of' the topportions of the wall, said cap alsobeing spaced from the topof the walland the sideand end portions thereof being. spaced from. the basesheet,v

means for supporting the cap relative to the base sheet, and the spacesbet-ween the cap and the wall and base sheet beingsufiicient to provideair flow spaces between the cap and the wall and base sheet which are atleast equal in area to that of the opening inthe base sheet.

2. A room type ventilator comprising, in combination, abase sheet havingan opening in the mid-portion thereof and providing mounting portionssurrounding the gears, tanv opening, means secured to the base sheet andproviding a 'wall' including adjoined side and end portions whichencompass the opening in adjacent relationship thereto, said side andend portions of the wall projecting upwardly from the base sheet anddiverging upwardly toward the tops thereof to provide Weather protectionby efiecting outward and downward deflection of driving rain and thelike and so that the opening encompassed by the wall is larger at thetop. than. at the. bottom, a screen secured to the wall and covering theopening encompassed by the wall at the. top-thereof, a cap covering thetop of the. openingencompassed. by the Wall and having side and end"portions respectively extending downwardly in overlapping and spacedrelationship to the exteriors of the side and end portions of the wall,and means for securing the cap to the base sheet in spaced relationshipto the tops of the side and end portions of the wall and the side andend portions. of the cap spaced from. the mountingportions of the basesheet. 77

3. A roof type ventilator as defined in claim 2, and wherein said screenincludes solid material and has openings therein, and also wherein theopening encompassed by the wall at the topthereof is sutficiently largerthan that at the bottom thereof to provide air flow space through theopenings of the screen equivalent in area to that through the opening,in the mid-portion of the base sheet.

4. A roof type ventilator as defined in claim 2, and wherein the planesof the portions of the end portions o'f'the cap which are in overlappingrelation to the end portions of the wall are substantially paralleltothe upwardly diverging endportions of the wall;

References Cited in the file of this patent UNITED STATES PATENTS638,835 Strawshine' May 19, I953 FOREIGN PATENTS 979,945 France Dec. 20,1950 71,465 Netherlands Dec. 15, l952

